Complete the identity. cos (alpha - beta)/cos alpha cos beta=?
2 answers:
When you see a formula like this, try to operate, so you will see some identities sooner or later. In this case, we have a substraction identity:
=
=
1 + tan α · tan β
Answer:
When you see a formula like this, try to operate, so you will see some identities sooner or later. In this case, we have a substraction identity:
\frac{cos ( \alpha - \beta )}{cos \alpha cos \beta } = \frac{cos \alpha cos \beta + sin \alpha sin \beta }{cos \alpha cos \beta } = 1 + tan α · tan β
Step-by-step explanation:
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If the ratio is 5-7... this means there are more consonants
Answer:
11
Step-by-step explanation:
A tangent forms a right angle with the centre of circle at the point it touches the circumference. i.e. OAB = 90 degrees
(2y-9)(2y-9)
Answer:
Erin gets £90
Step-by-step explanation:
Ratio = 5 : 2 : 7
Money with Erin = 5x
Money with Faye = 2x
Money with Sachin = 7x
Faye gets £90 less than Sachin
7x - 2x = 90
5x = 90
x = 90/5
x = 18
Money with Erin = 5*18 = 90
